J. Anim Sci.
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J. Anim Sci. 1969. 28:508-511.
© 1969 American Society of Animal Science
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Relationship of Hematocrit Values to Selected Physiological Conditions in Dairy Cattle1

A. G. Lane2 and J. R. Campbell2, 3,

University of Missouri, Columbia

Abstract

Jugular vein blood from 236 Guernsey cows was analyzed for hematocrit reading quarterly and related to physiological conditions of animals. Hematocrit values averaged 33.8 with a range of 19.5 to 42.5. Hematocrit values were observed to change during lactation and pregnancy. Neither bodyweight nor milk production level were related to hematocrit readings. Seasonal changes were demonstrated. Hematocrit values were lower in older animals. An effect of sires was found. Concentrations of TCA soluble whole blood minerals were correlated with hematocrit readings for lactating cows.

Footnotes

1 Contribution from The Missouri Agricultural Experiment Station. Journal Series No. 5505. Approved by the Director.

2 Department of Dairy Husbandry.

3 The authors thank Dr. G. F. Krause for statistical assistance.






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Copyright © 1969 by the American Society of Animal Science.